We use ZCM 11.4 on Linux.
We have a 3 TB SAN where all images are uploaded to.

We have never experienced this issue before, now randomly when uploading a image around we get.

Network is unreachable. Unable to connect to server. this occurs randomly as various times during the image upload process.
So the upload will start and then we will get the message later on. No exact time.

Any ideas for troubleshooting ?